Abstract: An object of the present invention is to provide a method for efficiently producing an ?-olefin low polymer at a high ?-olefin low polymer selectivity and a high ?-olefin low polymer yield with suppressing the deterioration of catalytic activity with time, and the invention relates to a method for producing an ?-olefin low polymer, which comprises performing a low polymerization reaction of an ?-olefin in the presence of a catalyst containing a chlorine atom-containing compound (d) and a reaction solvent, wherein the chlorine atom-containing compound (d) that are at least two compounds having specific chlorine atom elimination rate is supplied in predetermined ratio.

Abstract: The present invention relates to a method and an apparatus for producing an ?-olefin low polymer by subjecting an ?-olefin to low polymerization reaction in the presence of a catalyst in a liquid phase part within a reactor, and the present invention relates to a method and an apparatus for producing an ?-olefin low polymer, such as 1-hexene, etc., by subjecting an ?-olefin, such as ethylene, etc., to low polymerization reaction, in which the formation of a polymer on an upper tube plate surface of a shell and tube type heat exchanger that is used for heat removal is suppressed, thereby performing a continuous operation stably over a long period of time.

Abstract: An object of the present invention is to provide a method for suppressing the precipitation of polymers with a high concentration dissolved in a solvent in the operation termination step and suppressing the blockage of the apparatus by the polymers even when the polymers with a high concentration are precipitated, and the invention relates to a method for producing an ?-olefin low polymer comprising a production operation step and an operation termination step, wherein the supply position of a supply liquid to a distillation column in the operation termination step is changed to a position lower than the supply position of a supply liquid to the distillation column in the production operation step.

Abstract: The present invention relates to a method for producing an ?-olefin low polymer through low polymerization reaction of an ?-olefin in the presence of a catalyst containing a transition metal-containing compound, an aluminum-containing compound and a hydrocarbon having 2 or more carbon atoms and substituted with a halogen atom, and a solvent, which comprises a reaction step, a purification step and a circulation step of circulating the unreacted raw material ?-olefin and the solvent from the purification step to the reaction step; and in which the amount of the olefin having 2 or more carbon atoms and substituted with a halogen atom that is supplied from the circulation step to the reaction step is within a range of from 0.1 to less than 200 (molar ratio) relative to the amount of the transition metal in the reaction step.

Abstract: The present invention relates to a production method of an ?-olefin oligomer for producing an ?-olefin by performing an oligomerization reaction of an ?-olefin in a reaction solvent in the presence of a catalyst in a reactor, which is a production method of an ?-olefin oligomer, comprising circulating and feeding, to the reactor, a condensate liquid obtained by introducing part of gas of the gas phase part inside the reactor into a heat exchanger and cooling the gas, wherein the condensate liquid circulated and fed to the reactor is dispersed in the gas phase part inside the reactor; and a production apparatus of an ?-olefin oligomer.

Abstract: The present invention relates to a method and an apparatus for producing an ?-olefin low polymer by subjecting an ?-olefin to low polymerization reaction in the presence of a catalyst in a liquid phase part within a reactor, and the present invention relates to a method and an apparatus for producing an ?-olefin low polymer, such as 1-hexene, etc., by subjecting an ?-olefin, such as ethylene, etc., to low polymerization reaction, in which the formation of a polymer on an upper tube plate surface of a shell and tube type heat exchanger that is used for heat removal is suppressed, thereby performing a continuous operation stably over a long period of time.

Abstract: An object of the present invention is to provide a method for efficiently producing an ?-olefin low polymer at a high ?-olefin low polymer selectivity and a high ?-olefin low polymer yield with suppressing the deterioration of catalytic activity with time, and the invention relates to a method for producing an ?-olefin low polymer, which comprises performing a low polymerization reaction of an ?-olefin in the presence of a catalyst containing a chlorine atom-containing compound (d) and a reaction solvent, wherein the chlorine atom-containing compound (d) that are at least two compounds having specific chlorine atom elimination rate is supplied in predetermined ratio.

Abstract: An object of the present invention is to provide a method for suppressing the precipitation of polymers with a high concentration dissolved in a solvent in the operation termination step and suppressing the blockage of the apparatus by the polymers even when the polymers with a high concentration are precipitated, and the invention relates to a method for producing an ?-olefin low polymer comprising a production operation step and an operation termination step, wherein the supply position of a supply liquid to a distillation column in the operation termination step is changed to a position lower than the supply position of a supply liquid to the distillation column in the production operation step.

Abstract: The present invention relates to a production method of an ?-olefin oligomer for producing an ?-olefin by performing an oligomerization reaction of an ?-olefin in a reaction solvent in the presence of a catalyst in a reactor, which is a production method of an ?-olefin oligomer, comprising circulating and feeding, to the reactor, a condensate liquid obtained by introducing part of gas of the gas phase part inside the reactor into a heat exchanger and cooling the gas, wherein the condensate liquid circulated and fed to the reactor is dispersed in the gas phase part inside the reactor; and a production apparatus of an ?-olefin oligomer.

Abstract: The present invention relates to a method for producing an ?-olefin low polymer through low polymerization reaction of an ?-olefin in the presence of a catalyst containing a transition metal-containing compound, an aluminium-containing compound and a hydrocarbon having 2 or more carbon atoms and substituted with a halogen atom, and a solvent, which comprises a reaction step, a purification step and a circulation step of circulating the unreacted raw material ?-olefin and the solvent from the purification step to the reaction step; and in which the amount of the olefin having 2 or more carbon atoms and substituted with a halogen atom that is supplied from the circulation step to the reaction step is within a range of from 0.1 to less than 200 (molar ratio) relative to the amount of the transition metal in the reaction step.

Abstract: A method of producing an ?-olefin low polymer, wherein an ?-olefin is subjected to low polymerization in a solvent in the presence of a chromium catalyst and at least one inert gas. The proportion of the inert gas is maintained from 0.010 to 50.00% by volume in a gas phase part of a reactor, such that inert gas is discharged from the reactor and/or circulation piping when the proportion exceeds 50.00%. The chromium catalyst contains a chromium compound, at least one nitrogen-containing compound, an aluminum-containing compound, and optionally a halogen-containing compound. Unreacted ?-olefin and solvent separated from a reaction liquid are circulated back into the reactor.

Abstract: The object of the present invention is to provide a production method for a polyolefin, in which catalyst activity is improved, and a polyolefin such as a linear low density polyethylene can advantageously be industrially produced. The present invention relates to a production method for a polyolefin, in which in producing a polyolefin by the polymerization reaction of an olefin using a catalyst, an organohalide is present in the reaction system in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom as a concentration in a raw material olefin, and 1-hexene for linear low density polyethylene production raw material, containing an organohalide in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom.

Abstract: The object of the present invention is to provide a production method for a polyolefin, in which catalyst activity is improved, and a polyolefin such as a linear low density polyethylene can advantageously be industrially produced. The present invention relates to a production method for a polyolefin, in which in producing a polyolefin by the polymerization reaction of an olefin using a catalyst, an organohalide is present in the reaction system in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom as a concentration in a raw material olefin, and 1-hexene for linear low density polyethylene production raw material, containing an organohalide in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom.

Abstract: The object of the present invention is to provide a treatment method which deactivates deposits in a reactor and the like in a production process of an ?-olefin low polymer. The present invention relates to that after completion of the production of a low polymer of ethylene in a reactor 10 in the presence of a chromium series catalyst, a hydrocarbon compound solution containing an electron donative compound such as water or alcohol is supplied to the reactor 10 and a heat exchanger 16, thereby deactivating the deposits.

Abstract: The object of the present invention is to provide a method of recovering decene under the condition that a decomposition product of a chromium series catalyst and the like is difficult to form from a high boiler from which an ethylene low polymer has been separated, in a production method of an ethylene low polymer using a chromium series catalyst. The present invention relates to that an ethylene low polymer and a high boiler containing a chromium series catalyst, decene, tetradecene and a by-produced polymer are separated by evaporation operation from a reaction liquid containing an ethylene low polymer obtained by low polymerization reaction using a chromium series catalyst, and the high boiler is concentrated such that the tetradecene concentration is 5% by weight or more by an evaporative separator 70 and a liquid storage tank 80, and additionally, decene is evaporated and separated so as to satisfy the following general expression (1) wherein T is temperature (° C.

Abstract: The object of the present invention is to provide production method of an ?-olefin low polymer using a chromium series catalyst comprising a pyrrole compound as a component. The present invention relates to that in producing an ?-olefin low polymer such as 1-hexene using an ?-olefin such as ethylene as a raw material, a chromium series catalyst constituted of a chromium compound (a), a pyrrole compound (b) and an aluminum-containing compound (c) is used as a polymerization catalyst, and a concentration of a pyrrole dimer contained in the pyrrole compound (b) is 2% by weight or less based on the pyrrole compound (b).

Abstract: The object of the present invention is to provide a production method of an ?-olefin low polymer, wherein a low polymer of an ?-olefin is obtained in high yield. The present invention relates to that when an inert gas is allowed to exist in a gas phase part of a reactor 10 in the proportion of from 0.010 to 50.00% by volume, and an ?-olefin is subjected to low polymerization reaction in a solvent in the presence of a chromium series catalyst comprising a chromium compound (a), at lest one nitrogen-containing compound (b) selected from the group consisting of an amine, an amide and an imide, and an aluminum-containing compound (c), an unreacted ?-olefin and the solvent separated from a reaction liquid are circulated into the reactor 10, and where the proportion of the inert gas in the gas phase exceeds 50.00% by volume, the inert gas is discharged outside the reaction system from a gas phase part of the reactor 10 and/or a circulation piping 21 of an unreacted ?-olefin.

Abstract: A process for producing alcohols, which comprises subjecting a mixture comprising an aldehyde having from 2 to 5 carbon atoms and a polycondensate of the aldehyde at a weight ratio of from 95:5 to 5:95 to a mixing hydrogenation reaction in the presence of a catalyst to produce alcohols corresponding to the aldehydes at the same time wherein substantially no by-product is produced.